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Breast CancerPhase 2NCT07054190

A Study to Test Inavolisib Treatments in Participants With Early-Stage, PIK3CA-Mutated Breast Cancer

A Phase 2 study testing Inavolisib, Ribociclib and Letrozole in people with Breast Cancer, run by Hoffmann-La Roche at 37 sites in 7 countries.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
Search all trials

Trial summary

This study will evaluate the safety and efficacy of inavolisib combination therapies in participants with untreated, PIK3CA-mutated, Stage II-III, estrogen receptor (ER)-positive, Human Epidermal Growth Factor Receptor 2 (HER2)-negative breast cancer (BC). Read more about this study

Who is it for?
Ages 18 years and older, women only
Conditions the study is for
Breast Cancer
What is being tested?
Inavolisib, Ribociclib and Letrozole
Type of treatment
Pill or oral medicine
Could I receive a placebo?
No, everyone receives an active treatment
How many people
120 participants
Where
37 sitesin 7 countries
Study dates
9 Sep 2025to 28 Sep 2027
Phase
Phase 2
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • Women only
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Histologically confirmed operable or inoperable invasive Stage II-III BC according to American Joint Committee on Cancer (AJCC) TNM staging classification
  • Candidate for neoadjuvant treatment and considered appropriate for endocrine combination therapy
  • Willingness to undergo breast surgery (mastectomy or breast-conserving surgery) after neoadjuvant treatment (unless inoperable)
  • Documented ER-positive tumor in accordance with current American Society of Clinical Oncology (ASCO)/College of American Pathologists (CAP) guidelines
  • Documented HER2-negative tumor in accordance with current ASCO/CAP guidelines
  • Documented Ki-67 score >=5% as per local assessment
  • Confirmed PIK3CA mutation

Who cannot join

  • Stage IV (metastatic) BC
  • Inflammatory BC (cT4d)
  • Bilateral invasive BC
  • History of ductal carcinoma in situ or lobular carcinoma in situ if they have received any systemic therapy for treatment or radiation therapy to the ipsilateral breast
  • Previous systemic or local treatment for the primary BC currently under investigation (including excisional biopsy or any other surgery of the primary tumor and/or axillary lymph nodes, and sentinel lymph node biopsy, radiotherapy, cytotoxic, and endocrine treatments)
  • Type 2 diabetes requiring ongoing systemic treatment at the time of study entry; or any history of Type 1 diabetes

Trial locations and contacts

37 sites in 7 countries. Contact the study team or a site near you to ask about taking part.

Reference Study ID Number: BO45853 https://forpatients.roche.com/ No attachments to email below. contact

888-662-6728 (U.S. and Canada)

global-roche-genentech-trials@gene.com

Fastest response: use the inquiry form. https://www.gene.com/contact-us/submit-medical-inquiry contact

37 sites in 7 countries

Germany8 sites, 8 recruiting
  • Das Brustzentrum

    Berlin, 12623

    Recruiting
  • HELIOS Klinikum Berlin-Buch

    Berlin, 13125

    Recruiting
  • Universitätsklinikum "Carl Gustav Carus" der Technischen Universität Dresden

    Dresden, 01307

    Recruiting
  • Kliniken Essen-Mitte

    Essen, 45136

    Recruiting
  • Universitätsklinikum Heidelberg

    Heidelberg, 69120

    Recruiting
  • Philipps-Universität Marburg

    Marburg, 35043

    Recruiting
  • St. Vincenz-Krankenhaus GmbH Paderborn Frauen- und Kinderklinik St. Louise

    Paderborn, 33098

    Recruiting
  • HELIOS Klinikum Schwerin

    Schwerin, 19055

    Recruiting

Other trials in Germany

Spain7 sites, 7 recruiting
  • Vall d'Hebron Institute of Oncology (VHIO), Barcelona

    Barcelona, 08035

    Recruiting
  • Hospital Clinic Barcelona

    Barcelona, 08036

    Recruiting
  • Hospital General Universitario Gregorio Marañon

    Madrid, 28007

    Recruiting
  • Hospital Universitario 12 de Octubre

    Madrid, 28041

    Recruiting
  • Hospital Clinico Universitario de Salamanca

    Salamanca, 37007

    Recruiting
  • Hospital Universitario Virgen Macarena

    Seville, 41009

    Recruiting
  • Hospital Clínico Universitario de Valencia

    Valencia, 46010

    Recruiting

Other trials in Spain

United States6 sites, 6 recruiting
  • Texas Oncology - Central South

    Austin, Texas, 78731

    Recruiting
  • Texas Oncology - Northeast Texas

    Flower Mound, Texas, 75028

    Recruiting
  • West Cancer Center

    Germantown, Tennessee, 38138

    Recruiting
  • Los Angeles Cancer Network

    Los Angeles, California, 90017-4803

    Recruiting
  • West Virginia University

    Morgantown, West Virginia, 26506

    Recruiting
  • Community Clinical Trials

    Orange, California, 92868

    Recruiting

Other trials in United States

Canada5 sites, 5 recruiting
  • Centre Hospitalier de l'Universite de Montreal (CHUM)

    Montreal, Quebec, H2X 0C2

    Recruiting
  • Jewish General Hospital

    Montreal, Quebec, H3T1E2

    Recruiting
  • McGill University Health Center

    Montreal, Quebec, H4A 3J1

    Recruiting
  • Sunnybrook Odette Cancer Centre

    Toronto, Ontario, M4N 3M5

    Recruiting
  • BC Cancer - Vancouver

    Vancouver, British Columbia, V5Z 4E6

    Recruiting

Other trials in Canada

Brazil4 sites, 4 recruiting
  • Hospital Araujo Jorge

    Goiânia, Goiás, 74605-070

    Recruiting
  • Irmandade Da Santa Casa de Misericordia de Porto Alegre

    Porto Alegre, Rio Grande do Sul, 90035-074

    Recruiting
  • Hospital do Cancer de Pernambuco - HCP

    Recife, Pernambuco, 50040-000

    Recruiting
  • Clinica de Pesquisa e Centro de Estudos em Oncologia Ginecologica e Mamaria Ltda

    São Paulo, São Paulo, 01317-000

    Recruiting

Other trials in Brazil

South Korea4 sites, 4 recruiting
  • Seoul National University Hospital

    Seoul, 03080

    Recruiting
  • Severance Hospital, Yonsei University Health System

    Seoul, 03722

    Recruiting
  • Asan Medical Center.

    Seoul, 05505

    Recruiting
  • Samsung Medical Center

    Seoul, 06351

    Recruiting

Other trials in South Korea

Argentina3 sites, 3 recruiting
  • Hospital Aleman de Buenos Aires

    Buenos Aires, C1118AAT

    Recruiting
  • Centro Médico Fleischer

    Buenos Aires, C1414DRK

    Recruiting
  • Centro Oncologico Korben

    Ciudad Autonoma Buenos Aires, C1426AGE

    Recruiting

Other trials in Argentina

About this study

Official title: A Phase II, Open-Label, Multicenter Study Evaluating the Safety and Efficacy of Neoadjuvant Treatment With Inavolisib Combinations in Patients With Untreated, Early-stage, PIK3CA-Mutated Breast Cancer

This study will evaluate the safety and efficacy of inavolisib combination therapies in participants with untreated, PIK3CA-mutated, Stage II-III, estrogen receptor (ER)-positive, Human Epidermal Growth Factor Receptor 2 (HER2)-negative breast cancer (BC).

Conditions
Breast Cancer
Being tested
Inavolisib, Ribociclib, Letrozole, Giredestrant
Medical subject headings
Breast Neoplasms

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • InavolisibDrug

    Also called GDC-0077, RO7113755

    Inavolisib will be administered as per the schedule specified in the arms

  • RibociclibDrug

    Ribociclib will be administered as per the schedule specified in the arms

  • LetrozoleDrug

    Letrozole will be administered as per the schedule specified in the arms

  • GiredestrantDrug

    Giredestrant will be administered as per the schedule specified in the arms

Study groups in NCT07054190
Study groupRoleWhat they receive
Arm AExperimentalParticipants will receive inavolisib and letrozole orally (PO) once a day (QD) from Day 1 to 28 and ribociclib PO QD from Day 1 to 21 in cycles 1-5 (each cycle=28 days). In cycle 6, inavolisib, ribociclib and letrozole will be administered PO QD on days 1-21 (each cycle=21 days).
Receives: Drug: Inavolisib; Drug: Ribociclib; Drug: Letrozole
Arm BExperimentalParticipants will receive a starting regimen of inavolisib and letrozole PO QD from Day 1 to 28 in cycle 1 (each cycle=28 days). Starting on Day 1 of Cycle 2, all participants will receive the triplet regimen inavolisib + ribociclib + letrozole as follows: inavolisib and letrozole PO QD from Day 1 to 28 and ribociclib PO QD from Day 1 to 21 in cycles 2-5 (each cycle=28 days). In cycle 6, inavolisib, ribociclib and letrozole will be administered PO QD on days 1-21 (each cycle=21 days).
Receives: Drug: Inavolisib; Drug: Ribociclib; Drug: Letrozole
Arm CExperimentalParticipants will receive a starting regimen of ribociclib PO QD from Day 1 to 21 and letrozole PO QD from Day 1 to 28 in cycle 1 (each cycle=28 days). Starting on Day 1 of Cycle 2, all participants will receive the triplet regimen inavolisib + ribociclib + letrozole as follows: inavolisib and letrozole PO QD from Day 1 to 28 and ribociclib PO QD from Day 1 to 21 in cycles 2-5 (each cycle=28 days). In cycle 6, inavolisib, ribociclib and letrozole will be administered PO QD on days 1-21 (each cycle=21 days).
Receives: Drug: Inavolisib; Drug: Ribociclib; Drug: Letrozole
Arm D (non-randomized)ExperimentalParticipants will receive inavolisib and letrozole PO QD from Day 1 to 28 and ribociclib PO QD from Day 1 to 21 in cycles 1-5 (each cycle=28 days). In cycle 6, inavolisib, ribociclib and letrozole will be administered PO QD on days 1-21 (each cycle=21 days).
Receives: Drug: Inavolisib; Drug: Ribociclib; Drug: Letrozole
Arm EExperimentalParticipants will receive inavolisib and giredestrant PO QD from Day 1 to 28 and ribociclib PO QD from Day 1 to 21 in cycles 1-5 (each cycle=28 days). In cycle 6, inavolisib, ribociclib and giredestrant will be administered PO QD on days 1-21 (each cycle=21 days).
Receives: Drug: Inavolisib; Drug: Ribociclib; Drug: Giredestrant
Arm FExperimentalParticipants will receive a starting regimen of inavolisib and giredestrant PO QD from Day 1 to 28 in cycle 1 (each cycle=28 days). Starting on Day 1 of Cycle 2, all participants will receive the triplet regimen inavolisib + ribociclib + giredestrant as follows: inavolisib and giredestrant PO QD from Day 1 to 28 and ribociclib PO QD from Day 1 to 21 in cycles 2-5 (each cycle=28 days). In cycle 6, inavolisib, ribociclib and giredestrant will be administered PO QD on days 1-21 (each cycle=21 days).
Receives: Drug: Inavolisib; Drug: Ribociclib; Drug: Giredestrant
Arm GExperimentalParticipants will receive a starting regimen of ribociclib PO QD from Day 1 to 21 and giredestrant PO QD from Day 1 to 28 in cycle 1 (each cycle=28 days). Starting on Day 1 of Cycle 2, all participants will receive the triplet regimen inavolisib + ribociclib + giredestrant as follows: inavolisib and giredestrant PO QD from Day 1 to 28 and ribociclib PO QD from Day 1 to 21 in cycles 2-5 (each cycle=28 days). In cycle 6, inavolisib, ribociclib and giredestrant will be administered PO QD on days 1-21 (each cycle=21 days).
Receives: Drug: Inavolisib; Drug: Ribociclib; Drug: Giredestrant

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Percentage of Participants with Adverse Events (AEs)

    Measured: From first dose up to 30 days after last dose (approximately 8 months)

Secondary outcomes (7)
  1. Percentage of Participants with Total Pathological Complete Response (pCR)

    Measured: Up to approximately 8 months

  2. Percentage of Participants with Objective Response Rate (ORR), According to Modified Response Evaluation Criteria in Solid Tumors, Version 1.1 (mRECIST v1.1)

    Measured: Up to approximately 8 months

  3. Change From Baseline in Ki-67 Levels by Immunohistochemistry (IHC)

    Measured: Baseline, Day 22 of Cycle 1 and at Surgery (up to approximately 8 months). One cycle = 28 days

  4. Percentage of Participants Reporting Symptoms in Patient-Reported Outcomes of the Common Terminology Criteria for Adverse Events (PRO-CTCAE) Questionnaire

    Measured: Up to approximately 8 months

  5. Percentage of Participants Reporting Each Response Option at Each Time Point for the Treatment Side-Effect Bother Item (GP5) From the Functional Assessment of Cancer Therapy - General (FACT-G) Questionnaire

    Measured: Up to approximately 8 months

  6. Change from Baseline in Symptomatic Treatment-Related Toxicities as Assessed Through use of the PRO-CTCAE

    Measured: Baseline, up to approximately 8 months

  7. Change from Baseline in Treatment Side-Effect Bother as Assessed Through use of the FACT-G GP5 Item

    Measured: Baseline, up to approximately 8 months

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted8 Jul 2025
  2. Study start9 Sep 2025
  3. Primary completion31 Jul 2027 (estimated)
  4. Study completion28 Sep 2027 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
None (open label)
Enrolment
120 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT07054190
Sponsor's protocol ID
BO45853
Other IDs
2024-518811-20-00
Status last verified
Oct 2026
First submitted
26 Jun 2025
Last updated
26 Oct 2026
Results posted
No
Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
Yes: For eligible studies, qualified researchers may request access to individual patient level clinical data. See Roche's commitment to transparency of clinical study information here: https://go.roche.com/data\_sharing

Questions about this trial

What is this clinical trial studying?

A Phase 2 study testing Inavolisib, Ribociclib and Letrozole in people with Breast Cancer, run by Hoffmann-La Roche at 37 sites in 7 countries.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 7 inclusion and 6 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: looking for participants now, as of the sponsor's last update on 26 Oct 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 37 sites in Germany, Spain, United States, Canada, Brazil and 2 more countries. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Reference Study ID Number: BO45853 https://forpatients.roche.com/ No attachments to email below. (888-662-6728 (U.S. and Canada), global-roche-genentech-trials@gene.com), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Percentage of Participants with Adverse Events (AEs) (time frame: From first dose up to 30 days after last dose (approximately 8 months)). It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 26 Oct 2026.

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